I'm running this in my ten scte on a medium sized out door clay track. I have to say from my experience I would only recommend running this on small tracks. I was running a 14 tooth pinion but I started running hot so I was forced to drop down to a 13 tooth which killed top end speed and left me unable to keep up with trucks running the 4600 kv pro 4. With the 14 tooth I had a fast lap of 34 sec. with the 13 tooth it dropped to 37 sec. A pro driver at my track post fast lap times of 32 sec.